问题补充:
--- What book are you reading? Wow, Harry Porter! May I have a look at it?
--- Yes, of course. You have it as soon as I get through with it.
A. must
B. should
C. will
D. shall
答案:
A. must
B. should
C. will
(答案→)D. shall
解析:考情态动词的辨析。shall表允许和承诺。